America's Lung Association "State of the Air" reports ozone & particle pollution has caused unhealthy air pollution.

Google and Apple both issued rare alerts to their users this week, warning them that the air quality in Chicago had reached ...

A hazardous cloud of toxic air has engulfed a major US city, reportedly causing an emergency alert for toxic chemicals, with ...

Not everyone was reporting the dangerous air quality levels, though. The Environmental Protection Agency’s AirNow is a go-to ...

Despite improvements in air quality in past decades, 156 million Americans still breathe in too much soot or ozone, says the ...

The report measures data for six outdoor air pollutants considered dangerous: particulate matter, ozone, nitrogen dioxide, ...